Meaning of ostracon

os•tra•con

Pronunciation: (os'tru-kon"), [key]
— pl. -ca
  1. (in ancient Greece) a potsherd, esp. one used as a ballot on which the name of a person voted to be ostracized was inscribed.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.